By default the showOnClick: true option makes the menu tree behave like OS desktop menus where a click activates the tree and then the sub menus are activated immediately on hover. So you would need some sort of mod. The simplest one I can think of is to add the following code on your page after the SmartMenus jQuery code:
I have an issue at the moment where on menu I click a submenu and it dropsdown correctly, but when I click again it goes to the parent link or refreshes the page if my link is # on the parent dropdown.
When I add the showOnClick true option, I can click on the link and it drops down..but when I click again on it it does nothing, it does not minimise the dropdown…it does nothing